/* 自定义样式 */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

.card {
    border: none;
    border-radius: 15px;
    box-shadow: 0 8px 30px rgba(0,0,0,0.1);
    backdrop-filter: blur(10px);
    background: rgba(255,255,255,0.95);
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
    border-radius: 10px;
    padding: 12px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

.form-control {
    border-radius: 10px;
    border: 1px solid #e0e0e0;
    padding: 12px;
    transition: all 0.3s ease;
}

.form-control:focus {
    border-color: #667eea;
    box-shadow: 0 0 0 0.2rem rgba(102, 126, 234, 0.25);
    transform: translateY(-1px);
}

.list-group-item {
    border: none;
    padding: 15px 20px;
    background: transparent;
}

.badge {
    border-radius: 50%;
    width: 25px;
    height: 25px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.alert {
    border-radius: 10px;
    border: none;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    
    .card {
        margin-bottom: 15px;
    }
}